import test from 'node:test';
import assert from 'node:assert/strict';
import { readFile } from 'node:fs/promises';
import { createHash } from 'node:crypto';
import { Game, solveRotations, validateLevel } from '../src/core.js';
import { LEVELS } from '../src/levels.js';
import { CAMPAIGN_VERSIONS, campaignVersion } from '../src/campaign-versions.js';
import { CAMPAIGN_SELECTION_KEY, campaignProgressKey, selectedCampaign, normalizeProgress, readCampaignProgress, writeCampaignProgress } from '../src/campaign-progress.js';

const storage=entries=>{
  const items=new Map(Object.entries(entries||{}));
  return {getItem:key=>items.get(key)??null,setItem:(key,value)=>items.set(key,value)};
};

test('three selectable editions retain their own level counts, order and chapters',()=>{
  assert.deepEqual(CAMPAIGN_VERSIONS.map(c=>[c.id,c.levels.length,c.chapterSize,c.chapters.length]),[
    ['v0.1',24,8,3],['v0.2',48,6,8],['v0.3',48,6,8],
  ]);
  assert.equal(campaignVersion('v0.1').levels[0].name,'转一转，路就通了');
  assert.equal(campaignVersion('v0.1').levels.at(-1).name,'六角大满贯');
  assert.equal(campaignVersion('v0.2').levels[0].name,'一眼看见出口');
  assert.equal(campaignVersion('v0.3').levels,LEVELS);
  assert.equal(campaignVersion('v0.3').levels[0].name,'跟着弯道走');
  for(const c of CAMPAIGN_VERSIONS)assert.equal(c.chapterSize*c.chapters.length,c.levels.length);
});

test('browser archive module matches the exact historical JSON bytes and provenance',async()=>{
  const manifest=JSON.parse(await readFile(new URL('../levels/versions/provenance.json',import.meta.url),'utf8'));
  for(const source of manifest.versions){
    const bytes=await readFile(new URL('../'+source.archivePath,import.meta.url));
    assert.equal(bytes.length,source.bytes);
    assert.equal(createHash('sha256').update(bytes).digest('hex'),source.sha256);
    assert.deepEqual(campaignVersion(source.version).levels,JSON.parse(bytes.toString('utf8')));
  }
});

test('all 72 historical layouts solve and replay with the current free rotation rules',()=>{
  for(const c of CAMPAIGN_VERSIONS.slice(0,2))for(const [i,level] of c.levels.entries()){
    const label=`${c.id} level ${i+1}`;
    assert.deepEqual(validateLevel(level),[],label);
    const plan=solveRotations(level),game=new Game(level);
    assert.ok(plan.solvable&&!plan.exhausted,label);
    for(const action of plan.actions){
      const before=game.moves;
      if(action.type==='rotate'){
        assert.equal(game.rotate(action.direction).status,'rotated',label);
        assert.equal(game.moves,before,label);
      }else assert.equal(game.tap(action.id).status,'exit',label);
    }
    assert.ok(game.won,label);
  }
});

test('new players default to v0.3 while an explicit version choice survives reload',()=>{
  const s=storage();assert.equal(selectedCampaign(s).id,'v0.3');
  assert.ok(writeCampaignProgress(s,campaignVersion('v0.1'),{current:23,completed:[0,22]}));
  assert.equal(selectedCampaign(s).id,'v0.1');
  assert.deepEqual(readCampaignProgress(s,selectedCampaign(s)),{current:23,completed:[0,22]});
  s.setItem(CAMPAIGN_SELECTION_KEY,'v9.9');assert.equal(selectedCampaign(s).id,'v0.3');
});

test('versions keep progress separate even when v0.2 and v0.3 reuse level IDs',()=>{
  const s=storage(),v2=campaignVersion('v0.2'),v3=campaignVersion('v0.3');
  assert.equal(v2.levels[0].id,v3.levels[0].id);
  writeCampaignProgress(s,v2,{current:47,completed:[0,1,47]});
  assert.deepEqual(readCampaignProgress(s,v3),{current:0,completed:[]});
  writeCampaignProgress(s,v3,{current:7,completed:[6]});
  assert.deepEqual(readCampaignProgress(s,v2),{current:47,completed:[0,1,47]});
  assert.deepEqual(readCampaignProgress(s,v3),{current:7,completed:[6]});
  assert.deepEqual(readCampaignProgress(s,campaignVersion('v0.1')),{current:0,completed:[]});
});

test('each edition migrates only its own legacy slot without changing the old data',()=>{
  const old={
    'hex-trails-v2':JSON.stringify({current:20,completed:[0,20]}),
    'hex-trails-observe-v3':JSON.stringify({current:45,completed:[0,45]}),
    'hex-trails-observe-v3-r2':JSON.stringify({current:6,completed:[6]}),
  };
  const s=storage(old);
  for(const [i,c] of CAMPAIGN_VERSIONS.entries()){
    const key=Object.keys(old)[i],expected=JSON.parse(old[key]);
    assert.deepEqual(readCampaignProgress(s,c),expected);
    writeCampaignProgress(s,c,{current:1,completed:[1]});
    assert.deepEqual(readCampaignProgress(s,c),{current:1,completed:[1]});
    assert.equal(s.getItem(key),old[key]);
  }
});

test('invalid saves are bounded to each edition and do not resurrect legacy progress',()=>{
  assert.deepEqual(normalizeProgress({current:47,completed:[-1,0,0,23,24,47,1.5,'2',null]},24),{current:0,completed:[0,23]});
  const c=campaignVersion('v0.1');
  for(const raw of ['{','null','[]','true','"text"']){
    const s=storage({[campaignProgressKey(c.id)]:raw,'hex-trails-v2':JSON.stringify({current:20,completed:[20]})});
    assert.deepEqual(readCampaignProgress(s,c),{current:0,completed:[]});
  }
});

test('unavailable browser storage still permits loading a campaign',()=>{
  const denied={getItem(){throw new Error('denied');},setItem(){throw new Error('denied');}};
  for(const s of [undefined,denied]){
    assert.equal(selectedCampaign(s).id,'v0.3');
    assert.deepEqual(readCampaignProgress(s,campaignVersion('v0.1')),{current:0,completed:[]});
    assert.equal(writeCampaignProgress(s,campaignVersion('v0.1'),{current:1,completed:[0]}),false);
  }
});